After making the mistake of saying "Devotion wizard" as opposed to "Divination Wizard", I felt inspired to write a wizard subclass which is sort of a cousin to the Arcana Domain Cleric. As opposed to a divine caster with some arcane influences, this is an arcane caster with some divine influences. The idea is that rather than devotion to one particular deity, the Cosmology wizard draws its power from its understanding of the Great Wheel and the outer planes as a whole. Let me know what you think

Cosmology

Wizards belonging to the school of cosmology have an intimate knowledge of the Great Wheel and the pantheon of gods which rule over it. 

 

Sanctified Rituals

Beginning when you choose this school at 2nd level, drawing inspiration from the divine pantheon empowers your spellcasting. The gold and time you must spend to copy a spell with the ritual tag into your spellbook is halved. Additionally, cleric spells with the ritual tag are added to the wizard spell list for you. 

 Celestial Dichotomy 

Your spellcasting draws upon the balance of the Great Wheel and the many planes which comprise it. Also at 2nd level, from the influence of the upper and lower planes you gain two additional spells, as outlined below: 

Positive Spellcasting. Choose one of the following spells: Bless or Cure Wounds. The chosen spell counts as a Wizard spell for you, is always prepared, and does not count against the number of spells you can prepare. 

Negative Spellcasting. Choose one of the following spells: Bane or Inflict Wounds. The chosen spell counts as a Wizard spell for you, is always prepared, and does not count against the number of spells you can prepare.

Each time you gain a level in this class, you can replace one of the chosen spells with the other from its associated trait. 

Phenomenal Cosmic Power

In times of rest, you are able to channel the divine energies which suffuse the outer planes. Beginning at 6th level you can use your Arcane Recovery feature twice per day. At 14th level, you can use your Arcane Recovery feature three times per day and can recover spell slots of up to 6th level. 

Dichotomy of Order

At 10th level, the forces of law and chaos also influence your magic in the following ways:

Lawful Spellcasting. When you cast a spell of 1st level or higher that deals damage, you can replace the value rolled for the damage with its average value. Once you do so, you cannot use this feature again until you finish a long rest. 

Chaotic Spellcasting. When you cast a spell that requires you to make an attack roll, you can instead choose to flip a coin. On heads, the attack is treated as scoring a critical hit. On tails, the attack is treated as scoring a critical failure. If you alter your attack roll this way, it is not affected by sources of advantage or disadvantage. Once you have scored a critical hit this way, you cannot use this feature again until you finish a long rest.

Divine Barriers

Starting at 14th level, each time you complete a long rest you gain the effect of a Protection from Evil and Good spell for all of the listed creature types, which lasts until the start of your next long rest. If you attack a creature or target it with a spell, this effect ceases to protect you from any creatures of the same type for the remainder of its duration.